Paper-making machinery



Oct. 2, 1928.

c. L. HENDERSON PAPER MAKING MACHINERY I Filed April 17, 1925 2Sheets-Sheet Rue/7357 w/"ZQSL. fzavzaanson Oct. 2, 1928.

C. L. HENDERSON PAPER MAKING MACHINERY Filed April l'i', 1925 2Sheets-Sheet 2 SOLENOID 13 RECT/F/ER Patented Oct. 2, 1928.

. UNITED CHARLES In. HENDERSON, OF NEENAH, WISCONSIN, ASSIGNOR TO PAPERPATENTS COMPANY, OF NEENAH, WISCONSIN, A CORPORATION OF WISCONSIN.

PAPER-MAKING MACHINERY.

Application filed April 17, 1925.

This invention relates to machinery for making paper, but moreparticularly to screens or strainers for the purpose of removing fromthe pulp, all lumps or undigested stock which would show in the paper 1fpermitted to remain. This screen 1S Of the fiat type in which the stockis caused to pass through slotted plates by the vibration of diaphragms.

The primary object of my invention is to produce a simple and effectivemechanism for Operating the diaphragm which will increase the capacityof the screen, reduce the cost of contruction and maintenance,

and consume less power than existing mechanisms of a similar character.

Further objects are to provide noiseless operation, to permit repairs tothe screen while in operation, to eliminate friction and the necessityfor oiling parts, to reduce the amount of space required, to eliminatepulleys and belts, to provide a variable stroke independent of thespeed, to provide more flexibility in arrangement, to provide balance ofthe moving parts, and in general to provide a new and improvedscreen-construction.

The many other objects and advantages of my improved screen or strainerwill be better understood by reference to the following specificationwhen considered in connec tion with the accompanying drawingsillustrating a selected embodiment thereof, in which 7 Fig. 1 is alongitudinal section of a screen embodying the principles of myinvention.

Fig. 2 1s a bottom plan view of the diaphragm operating mechanism shownin Fi 1 I Fig. 3 is a transverse section on the line 33 of Fig. 1. Fig.4 is a diagrammatical view of the electrical connections of theoperating solenoid. and

Fig. 5 is a fragmentary plan view.

Referring to the drawings, a series of slotted screen plates 10 aresupported in the screen frame 11, above the vibrating diaphragm 12. Theparticular construction of this frame forms no part of thepresentinvention, but in this embodiment comprises an upper receptacle13 supported by a cen tral frame l on which the plates 10 rest, and alower section 15. The diaphragm 12 of rubber or other suitable material,is held at the bottom to avoid choking.

Serial N0. 23,765.

between the central and lower sections. Any suitable form of base-orsupport for the screen may be provided. The plates extend between thecross pieces 16 and 16 of the central frame, and between these piecesand the end pieces 17, and are preferably slotted as at 18. The spacingand width of these slots may be varied but generally they are formednarrower at the top than termediate cross pieces 16 are preferably madenarrower than the :others to permit the vibrating of the diaphragms inthe manner which will be presently-described. A single diaphragmpreferably extends under the entire screen but this diaphragm acts as aseries of separate diaphragms 19 in view of the fact that the same isheld between the cross pieces 16 and corresponding pieces 20 of thelower frame as at 21. The screen frame is generally constructed of woodthough any other suitable material may obviously be used.

The mechanism forvibrating the diaphragm 19 will now be described.Plates as 30 and 31 are preferably placed on opposite sides of each ofthese diaphragms and secured togther by bolts as 32 which in the )resentembodiment also attach thereto rackets, 33, Downwardly projecting arms34 are provided on each of these brackets and pivot or crank pins as 35'have their opposite ends suported in these arms. Adjoining diaphragmsare operated by substantially T-shaped crank members as 36, two beingpreferably provided at each position. Each of these members has bearingsas 37, formed at the extremities of the cross arm and the correspondingcrank pins 35 extend therethrough. A casting as 38 supports anelectromagnetic device, in. this instance a solenoid 39, and thiscasting is provided at each of the ends with oppositely disposedbearings 40 which support a pivot pin 41.. This pin passes throughbearings 42 in the T-shaped crank members and such bearings ported inthese bearings. Rods 45 connect these crank pins with the cores 47 ofthe The insolenoid and such rods are provided at their rent generator 51wound to deliver current at a low frequency, for example, 10 to 15cycles per second. This low frequency A. 0. current passes throughwiring 52 to a suitable rectifier 53 which thus delivers a pulsatingcurrent to the solenoid. The cores of the solenoid preferably moveapproximately a small fraction of an inch, say %;th for each pulsationof the current. I

The diaphragms 1'9 are operated by the solenoid in thefollowing-manner:As one of the rods 45 is forced outwardly, the de-'pending stems of the corresponding pair of T-shaped members are causedto rock about the axis of the pivot 41, imparting a similar rockingmovement to the cross pieces of such members. This forces thecorresponding outer diaphragm upwardly and draws the inner diaphragmdownwardly. The flexing of the diaphragms returns the parts to nor malposition when the current impulse ceases, or if desired any suitablespring may be employed for that purpose. The same diaphragm action isprovided by the other of the solenoid rods. It will thus be ob servedthat one diaphragm of each pair will be moving upwardly, while the otheris mov ing downwardly and since the rods 45 are simultaneouslyreciprocated in opposite directions, oppositely disposed diaphragms areactuated simultaneously in the same direction whereby a balanced effectis obtained which greatly reduces the strain to which the screener isotherwise subjected.

Itwill be observed that the members 16 form, in effect, partitionsbetween the separate compartments of the apparatus. Each compartment isthus provided with an upper screen and a flower separate diaphragm. Byusing separate screen compartments the diaphragms in adjacentcompartments may be reciprocated in opposite directions so that a properbalanced actionmay be secured.

In the present invention waste of power is eliminated. The operation issubstantially noiseless and repairs may readilv be made while the screenis in operation. The cost of construction and maintenance is materiallyreduced. All parts are in perfect balance,

and more flexibilityin arrangement is possible. The stroke may be variedindependently of the speed.

I am aware that the form and arrangement or parts may be considerablyvaried without departing from the spirit of my invention and I reservethe right to make all such as fairly fall within the scope of thefollowing claims.

I claim as my invention:

1. In a machine of the class described, the combination with adiaphragm, of means for imparting a vibratory movement to said diaphragmincluding an electro-magnetic device coacting with said diaphragm andmeans for energizing'said device.

2. In a device of the class described, the combination with a screen anda diaphragm for forcing paper stock through said screen, of means forimparting a vibratory movement to said diaphragm including anelectro-magnet having a reciprocating core connected'to said diaphragm,and means for supplying pulsating current to the electromagnet.

3. A device for screening paper stock comprising a slotted plate, adiaphragm disposed opposite said plate for forcing the "stock throughthe slots in said plate, and

means for imparting a vibratory movement to sald dlaphragm including asolenoid havmg acore connected to said diaphragm. and

means for supplying pulsating current to the solenoid.

4. In a device of the class described, a screen for straining the paperstock, 21. vibratory diaphragm opposite said screen for drawing thestock through said screen, and means for actuating said diaphragmincluding a solenoid and a core connected to said diaphragm and actuatedby said solenoid.

5. In adevice of the class described, a

screen for straining the paper stock, a vibratory diaphragm disposedopposite said screen for drawing portions of the stock through saidscreen, and means for actuat' ing said diaphragm including a solenoid, areciprocating core for said solenoid, and a.

crank arm connecting said core with said diaphragm.

6. In a device of the class described, a screen for straining paperstock, a vibratory diaphragm disposed opposite said screen for drawing aportion of the stock through said screen, and means for actuating saiddiaphragm including a solenoid having its axis substantially parallel tothe plane of the diaphragm, a core within said solenoid and movablethereby longitudinally of said axis,

and a bell crank connecting said armature with said diaphragm.

7 In a device of the class described, the

combination of a screen, a pair of diaphragms, each disposed opposite adiflerent portion of said screen, means for simultaneously impartingmovement in the same direction to said pair of diaphragms comprising apair of operating rods disposed substantially in longitudinal alignmentrelative to each other, and means for imparting movement to said rodssimultaneously in opposite directions.

8. In a device of the class described, a screen for straining paperstock, two pairs of diaphragms each diaphragm being disposed opposite adifferent portion of said screen, bars connecting said diaphragms ofeach pair, said bars'being pivoted intermediate their points ofconnection with said diaphragms and having an arm extending therefrom, aseparate rod connected at the, end to each of said arms and means forimparting simultaneous movement to said rod in opposite directions.

9. In a device of the class described, a screen for straining the paperstock, and means for drawing a portion of the stock through said screenincluding a pair of diaphragms each disposed opposite a differentportion of said screen, a bar connecting said diaphrag'ms and pivotallysupported midway between'the points of connection, an arm extendinglaterally from said bar at said midway point and forming with said bar asubstantially T-shaped member, and

combination of a screen, a pair of diaphragms, each disposed opposite adifferent portion of said screen, means for simultaneously impartingmovement in the same direction to said pair of diaphragms comprising apair of bell cranks pivotally mounted intermediate their respective armson a fixed portion of the device, and each having one arm pivotallyconnected respectively to one of said screens, a pairof oppositelydisposed and substantially longitudinally aligned operating rods, eachhaving one end pivotally connected respectively to the other arm of saidbell cranks, and means for efiecting longitudinal movement of said rodssimultaneously in opposite directions.

11. In a device of the class described, a screen for straining paperstock, a plurality of diaphragms for aiding the straining operation, andmeans for actuating said diaphragms comprising a pair of operating rodsreciprocatingly actuated simultane ously in opposite directions.

CHARLES L. HENDERSON.

